Crushing, material-reducing, grinding and like machines

Details Crushing, material-reducing, grinding and like machines Crushing, material-reducing, grinding and like machines

B - Operations, Transporting

02

C

241/44

B02C 2/00 (2006.01)

Patent

CA 1060414

ABSTRACT OF THE DISCLOSURE A crushing part or component of a gyratory grinder or other crushing, grinding or material-reducing machine is provided with a shock-absorbing backing material which has improved toughness and resilience and is formed of a filled polyurethane resin composition the resin component of which is derived from a cold-curing system comprising (i) at least one polyether polyol having more than 2-OH groups per molecule, (ii) at least one polyol containing both ester and ether groups and having more than 2-OH groups per molecule, (iii) at least one polyether diol and (iv) at least one aromatic polyisocyanate, there being an excess of CNO groups over -OH groups in the system. - 1 -

240900

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